medium or long cage mech needed?

sofaboy73

need a new rear mech as large rock has killed the last one. looking at one of these

http://www.chainreactioncycles.com/shim ... -prod83162

currently running 2x10 set up (38 / 24 and 11 / 36), could i get away with a medium cage or is it another long needed?

felix.london

I think the GS (medium cage) has a max. capacity of 35T so you'll need the long cage

ej2320

I have the same 2x10 setup and I'm using a long cage as per Shimanos guidance
Also worth noting Shimano are very exact with their setup.. When they say a medium cage won't fit they mean it

rockmonkeysc

I was running a medium with 36/26 and 11-34 and it was on the limit. I would go long for your set up.

sofaboy73

cheers guys, thought that might be the case but worth checking before pulling the trigger

supersonic

Easy enough to work out ;-)

14 difference in the front cogs.

25 difference in the rear cogs.

Add 'em together = 39

So your mech needs a capacity more than that ;-).

benpinnick

On a ht you can get away with 10t spacing on the front, but on an fs it's 8max.